Is Dovecot an IMAP?

Dovecot is an open-source IMAP and POP3 server for Unix-like operating systems, written primarily with security in mind. According to the Open Email Survey, as of 2020, Dovecot has an installed base of at least 2.9 million IMAP servers, and has a global market share of 76.9% of all IMAP servers.

How do I test my Dovecot IMAP?

Test using imaps port (assuming you haven’t disabled imaps port): # openssl s_client -connect * OK Dovecot ready. Test using imap port and STARTTLS command (works also with imap port): # openssl s_client -connect -starttls imap * OK Dovecot ready.

How do I set up an IMAP server?

Set up IMAP

  1. On your computer, open Gmail.
  2. In the top right, click Settings. See all settings.
  3. Click the Forwarding and POP/IMAP tab.
  4. In the “IMAP access” section, select Enable IMAP.
  5. Click Save Changes.

How do I set up Dovecot?

Install and configure Dovecot on CentOS

  1. Prerequisites. You need the following operating system and software to use Dovecot:
  2. Install Dovecot.
  3. Configure Dovecot.
  4. Configure the authentication process file.
  5. Configure the mail location.
  6. Configure Postfix SMTP authentication.
  7. Configure POP3.
  8. Create a mailbox.

Does postfix support IMAP?

Setup Overview In our setup, Postfix sends and receives mail from Internet and stores them in the user mailboxes while clients on the Internet can retrieve their mails via Courier IMAP or POP3. The user authentication is done by Courier Authdaemon.

How do I check my IMAP authentication?

Testing the IMAP Server

  1. From your normal account, telnet to the IMAP port on the server you’re setting up: telnet foobar imap If your server is running, you’ll get the following message: Trying…
  2. Use “imtest” to test logging in with plaintext passwords: /usr/local/bin/imtest -m login foobar.

How do I test IMAP SSL connection?


  1. connect to a mail server using openssl : # openssl s_client -showcerts -connect -servername
  2. Check output and make sure that a valid certificate is shown: Server certificate.
  3. Make sure that you received IMAP server response:

What port is Dovecot?

Open the following ports for the service: 25 (default SMTP) 143 (default IMAP) 993 (SSL/TLS IMAP)

What do you need to know about Dovecot IMAP server?

LMTP allows for a highly scalable and reliable mail system. It also allows us to use the sieve plugin to filter inbound messages to different folders. Edit the Dovecot main configuration file.

Which is the default email format in Dovecot?

Note that you should not enable the submission protocol in Dovecot, because we have already enabled submission service in Postfix. Save and close the file. mbox is the traditional and default format for storing emails. Each user’s emails are stored in a single file /var/mail/username.

How to add LMTP to Dovecot Postfix file?

Edit the Dovecot main configuration file. Add lmtp to the supported protocols. Save and close the file. Then edit the Dovecot 10-master.conf file. Change the lmtp service definition to the following. Save and close the file. Next, edit the Postfix main configuration file.

Where do I find the configuration files for Dovecot?

Prebuilt packages usually install the configuration files into /etc/dovecot/. You’ll find the correct path by running: It’s a good idea to read through all the config files and see what settings you might want to change.